Stoic conception of categories is in the research of Stoic philosophy relatively less explored area. Many of the texts about stoicism engage stoic categories only marginally or not at all. We have only fragments of works of the early Stoic who were deeply involved in metaphysics and even those reference problem of categories only very little. Those fragments lack a specific list of Stoic categories that we know from later authors and even places which explicitly discuss each category are relatively scarce. During the reconstruction of the Stoic theory of categories we often rely on later thinkers and secondary sources, whose authors were not often supportive of Stoic philosophy and their explicit goal was to refute it. Despite these difficulties we try to reconstruct the Stoic system of categories, based on contemporary interpretive attempts of the key texts.